<template>
  <div>  <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!--  提示区域 -->
   <el-alert
    title="添加商品信息"
    type="info"
    show-icon
    :closable="false">
  </el-alert>
   <!-- 步骤条区 -->
  <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
    <el-step title="完成"></el-step>
</el-steps>
<!-- tab栏区 -->
<el-form :model="addForm" :rules="addFormrules" ref="ruleForm"
 label-width="100px" label-position='top'>
 <el-tabs v-model="activeIndex"  :tab-position="'left'" :before-leave='beforeTabLeave' @tab-click="tabClick">
    <el-tab-pane label="基本信息" name="0">

    <el-form-item label="商品名称" prop="goods_name">
    <el-input v-model="addForm.goods_name "></el-input>

      <el-form-item label="商品价格" prop="goods_price">
      <el-input v-model="addForm.goods_price" type="number"></el-input>
      </el-form-item>

      <el-form-item label="商品重量" prop="goods_weight">
      <el-input v-model="addForm.goods_weight"></el-input>
      </el-form-item>

       <el-form-item label="商品的数量" prop="goods_number">
      <el-input v-model="addForm.goods_number" type="number"> </el-input>
      </el-form-item>
       <el-form-item label="商品分类" prop="goods_cat">
    <!-- options 用来绑定数据源 -->
    <!-- props 用来指定配置对象 -->
    <!-- v-model 在这里必须绑定的是一个数组 -->
    <!--  :props="cateProps" -->
     <el-cascader
     :props="cateProps"
    :options="catelist"
    v-model="addForm.goods_cat"
    @change="handleChangge">
  </el-cascader>
      </el-form-item>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数"  name="1">
      <!-- 渲染表单Item项 -->
    </el-tab-pane>
    <el-tab-pane label="商品属性"  name="2"></el-tab-pane>
    <el-tab-pane label="商品图片"  name="3">
      <!--action 图片表示要上传到那个地址  -->
      <el-upload action='http://127.0.0.1:8888/api/private/v1/upload'
      :on-preview="handlePreview"
      :on-remove="handleRemove"
       list-type="picture"
       :headers='headersObj' @success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件,且不超过500kb</div>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容"  name="4">
      <el-form-item label="商品名称" prop="goods_name">
        <el-input v-model="addForm.goods_name"></el-input>
      </el-form-item>
      </el-tab-pane>
  </el-tabs>
</el-form>
</el-card>
</div>
</template>

<script>
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的数据对象
      addForm: {
        goods_name: '',
        goods_price: '',
        goods_weight: 0,
        goods_number: 0,
        // 这是商品所属的数组
        goods_cat: [],
        // 图片的数组
        pics: []
      },
      addFormrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品的重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品的数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品的分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 这是动态参数列表
      manyTalbeData: [],
      //  图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //  获取所有上商品的分类依据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 这是级联选择器变化会触发这个函数
    handleChangge() {
      console.log(this.addForm.goods_cat)
    },
    beforeTabLeave(activeName, oldActiveName) {
      /*  console.log('即将离开的标签页的名称是' + oldActiveName)
      console.log('即将进入的标签页的名称是' + activeName) */
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClick() {
    //  证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败')
        }
        this.manyTalbeData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview() {},
    // 处理移除图片的操作
    handleRemove() {},
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1.先拼接得到一个图片信息对象
      const picInfo = { pic: response.tmp_path }
      // 2. 将图片 信息对象push单pics数组中
      this.addForm.pics.push(picInfo)
    }

  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>

</style>>
